package com.louisgeek.classichu.basic.tool;

import java.io.FileInputStream;
import java.io.IOException;
import java.util.HashMap;

/**
 * Created by louisgeek on 2016/11/15.
 */
@Deprecated
public class FileTypeTool {

        public static final HashMap<String, String> mFileTypes = new HashMap<String, String>();
        static {
            //images
            mFileTypes.put("FFD8FF", "jpg");
            mFileTypes.put("89504E47", "png");
            mFileTypes.put("47494638", "gif");
            mFileTypes.put("49492A00", "tif");
            mFileTypes.put("424D", "bmp");
            //
            mFileTypes.put("41433130", "dwg"); //CAD
            mFileTypes.put("38425053", "psd");
            mFileTypes.put("7B5C727466", "rtf"); //日记本
            mFileTypes.put("3C3F786D6C", "xml");
            mFileTypes.put("68746D6C3E", "html");
            mFileTypes.put("44656C69766572792D646174653A", "eml"); //邮件
            mFileTypes.put("D0CF11E0", "doc");
            mFileTypes.put("5374616E64617264204A", "mdb");
            mFileTypes.put("252150532D41646F6265", "ps");
            mFileTypes.put("255044462D312E", "pdf");
            mFileTypes.put("504B0304", "zip");
            mFileTypes.put("52617221", "rar");
            mFileTypes.put("57415645", "wav");
            mFileTypes.put("41564920", "avi");
            mFileTypes.put("2E524D46", "rm");
            mFileTypes.put("000001BA", "mpg");
            mFileTypes.put("000001B3", "mpg");
            mFileTypes.put("6D6F6F76", "mov");
            mFileTypes.put("3026B2758E66CF11", "asf");
            mFileTypes.put("4D546864", "mid");
            mFileTypes.put("1F8B08", "gz");
            //mFileTypes.put("", "");
            //mFileTypes.put("", "");
        }
        public static String getFileType(String filePath) {
            return mFileTypes.get(getFileHeader(filePath));
        }
        //获取文件头信息
        public static String getFileHeader(String filePath) {
            FileInputStream is = null;
            String value = null;
            try {
                is = new FileInputStream(filePath);
                byte[] b = new byte[3];
                is.read(b, 0, b.length);
                value = bytesToHexString(b);
            } catch (Exception e) {
            } finally {
                if(null != is) {
                    try {
                        is.close();
                    } catch (IOException e) {}
                }
            }
            return value;
        }
        private static String bytesToHexString(byte[] src){
            StringBuilder builder = new StringBuilder();
            if (src == null || src.length <= 0) {
                return null;
            }
            String hv;
            for (int i = 0; i < src.length; i++) {
                hv = Integer.toHexString(src[i] & 0xFF).toUpperCase();
                if (hv.length() < 2) {
                    builder.append(0);
                }
                builder.append(hv);
            }
            return builder.toString();
        }
        public static void main(String[] args) throws Exception {
            final String fileType = getFileType("D:/apache-tomcat-6.0.35.tar.gz");
            System.out.println(fileType);
        }
    }


